2zmf

Crystal structure of the C-terminal GAF domain of human phosphodiesterase 10A

spinqualitylabelsall models 2zmf, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2zmf is a 2 chain structure with sequence from Human. This structure supersedes the now removed PDB entry 2e4s. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CMP NonStd Res: MSE Gene: PDE10A (HUMAN) Activity: 3',5'-cyclic-nucleotide phosphodiesterase, with EC number 3.1.4.17 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PDE10_HUMAN] Plays a role in signal transduction by regulating the intracellular concentration of cyclic nucleotides. Can hydrolyze both cAMP and cGMP, but has higher affinity for cAMP and is more efficient with cAMP as substrate. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Cyclic nucleotide phosphodiesterases (PDEs) catalyze the degradation of the cyclic nucleotides cAMP and cGMP, which are important second messengers. Five of the 11 mammalian PDE families have tandem GAF domains at their N termini. PDE10A may be the only mammalian PDE for which cAMP is the GAF domain ligand, and it may be allosterically stimulated by cAMP. PDE10A is highly expressed in striatal medium spiny neurons. Here we report the crystal structure of the C-terminal GAF domain (GAF-B) of human PDE10A complexed with cAMP at 2.1-angstroms resolution. The conformation of the PDE10A GAF-B domain monomer closely resembles those of the GAF domains of PDE2A and the cyanobacterium Anabaena cyaB2 adenylyl cyclase, except for the helical bundle consisting of alpha1, alpha2, and alpha5. The PDE10A GAF-B domain forms a dimer in the crystal and in solution. The dimerization is mainly mediated by hydrophobic interactions between the helical bundles in a parallel arrangement, with a large buried surface area. In the PDE10A GAF-B domain, cAMP tightly binds to a cNMP-binding pocket. The residues in the alpha3 and alpha4 helices, the beta6 strand, the loop between 3(10) and alpha4, and the loop between alpha4 and beta5 are involved in the recognition of the phosphate and ribose moieties. This recognition mode is similar to those of the GAF domains of PDE2A and cyaB2. In contrast, the adenine base is specifically recognized by the PDE10A GAF-B domain in a unique manner, through residues in the beta1 and beta2 strands. Crystal structure of the GAF-B domain from human phosphodiesterase 10A complexed with its ligand, cAMP.,Handa N, Mizohata E, Kishishita S, Toyama M, Morita S, Uchikubo-Kamo T, Akasaka R, Omori K, Kotera J, Terada T, Shirouzu M, Yokoyama S J Biol Chem. 2008 Jul 11;283(28):19657-64. Epub 2008 May 13. PMID:18477562 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphodiesterase 3D structures

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